Unreal Engine Issues
Unreal Engine Issues
USplineMeshComponent::CalcBounds may return invalid value
USplineMeshComponent::CalcBounds function should be returning an FBoxSphereBounds type, but in the implementation it instead outputs an FBox. This may result in the returning of invalid results, esp ...
Performance slowdown when ray tracing is disabled due to SetResidencyPriority
UE - Rendering Architecture - RHI - Jul 17, 2025When a game is compiled with ray tracing disabled (D3D12_RHI_RAYTRACING=0) and the GPU the game is running on becomes low on VRAM, frame time is negatively impacted and doesn't recover. The D3D12_RH ...
Lumen Translucency lighting vs opaque mismatch is larger than expected
UE - Graphics Features - Lumen - Sep 5, 2025The licensee's VFX team has been struggling with getting their Niagara systems with translucent materials to fit into the environments they are being used in. In a project with default settings, the ...
Uasset causes editor to crash when opened/right clicked
UE - Gameplay - Blueprint - Oct 21, 2014Character asset will crash the editor immediately when opened or right clicked. Crash Report: 431837 ...
HydroErosion on landscape crashes on Linux
UE - Platform - Linux - Mar 13, 2015While on a Linux OS, the editor immediately crashes if the Hydro Erosion tool is used on a landscape. ...
This project crashes when one Blueprint is compiled if its child Blueprint is opened in another tab
UE - Gameplay - Blueprint - Mar 18, 2015This project crashes when one Blueprint is compiled if its child Blueprint is opened in another tab. This only occurs with one Parent/Child combination: the crash occurs when compiling Building whil ...
Newly Created Landscape using Material with Displacement and Tessellation Flickers
UE - LD & Modeling - Terrain - Landscape - Apr 8, 2016Upon creating a new landscape that uses a material with displacement and tessellation, the landscape and its respective components will flicker. The flickering can be removed when you begin sculptin ...
Editor crashes when attempting to doubleclick static mesh in content browser
UE - Graphics Features - Jan 16, 2015Edit: Fatal error: [Link Removed] [Line: 1467] Couldn't find Shader TShadowDepthVSVertexShadowDepth_OutputDepthfalse for Material Resource M_Base_Advanced_blend! With VF=FLocalVertexFactory, Platf ...
Spline blueprints cause negative values in Scene Outliner until build pressed again
Tools - Nov 6, 2014Moving a spline mesh in the viewport causes negative values to be applied in the scene outliner actor count until the level is built again. ...